I've had my DStwo card for at least 2 years now, but it suddenly decided not to save my game's progress a few weeks ago. Everything was fine, but when I went to return to my game (a DS game loaded from Bagplug) everything I had done the previous evening hadn't been recorded, despite the system lying to me when I had saved both in-game, and with the save-states. The data from the night before last was still there. I cleaned the contacts on both the SD card and DSTwo card, and popped it back in. I tested it, and it saved fine. Last night it did it again, with a GBA game played on the DSTwo's GBA emulator. About 2 hours' progress has disappeared. My game remains as it was, like last night never happened. Is it the DSTwo card, or my SD card? I bought them both at the same time, and I know my SD card isn't a fake; I bought it in New Zealand's equivalent of Best Buy. Any help would be appreciated, and thank you!